1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7717cea7c1ad577b59fae065db548be5d3de3c03574222dba763cfc344f43c09. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f03404a2-7b54-476e-b01f-c26d23ceed15.json and https://artists.proofprofile.net/proofs/artist/f03404a2-7b54-476e-b01f-c26d23ceed15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca89e71185123e9dc57e9ed4dbe5c1e5c11b79d6fbcd5864ab1b4430b5eefeb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82181818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd99870a8a0a54bd7720abf570e9e2ebfaa7f7b1ce219bfa69b8a159b86d581. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82181821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec83bcd651df5e2c71cc3d2abe86dfad188073d6a7ed3db7391a97039e495c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82181823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc155b581cc9e7f875bfafaaa04cbdb84ab96e5be979ab3d798f7e8058de94. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82181824.
Bárhova indulnál 1972 (Bátyám, Dodó Film) [halott-rokker verzió]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781a162165030927846dba043aa00a2a9086ffd85ccd3f64c6d81289feb3894e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB22273842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27959179a06d974676cd0bb91baf92e3d812f06ff4fec61bf5c36c1b1da2fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA72317669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00121e012d00e95d3fc4dc11fc8d623700bb4b8a63d8b3e97f49040ed101d21b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182346201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b3a3e2c207873c4871323c014099abc48e75d7a30c3c0ea32fcead1207b907. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182346202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2780f8fea4c625335d8bf9be9bd4cfeb746f9d8ae39ed0e4d6a6427bbd8a8c4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182346203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0a893a7bd3726fa909f98695ec0da354efe2343e33dcb5574a22228b4fd0d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182346204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67191490045ae6ec0acebba924723b6eb8c3343cfdb89a04539b4872ee263b0b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182346205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beb96b54ce9178dd11f9c624d3816d88dee5bb46031e234276f6df09eb54984. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7b9e5bb6399c8cd446052de20d246f30f5685ce03546476147dea1594427f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e338e94756ee3f378abda9a2627f49dae41554900bc231c653708e7d3d314c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe572da8c199beea0cc7fa130f8ed73b6033d94a7025b436418127b7a6d6b47e9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2385f14adb34901663df99440e39fb57274a6e9c9737d2e860c5e6ae2e9517d4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecabe6cd43aec191b28ccb8ed93387c5e8f85cf2322c11fbca9fa872fd318a6. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26970cfcf0ba4a08811b59dcda31e0c447911904d4410e4a17416de63e56bf9d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182429101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa0d6cf1bb16ef3d994ce26cfb62a65c4db2c296ae88eb451f648dac7618890. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20634268a3faf401b7dcc1a5fe085871fe8bafcef0a877b30eb11dfc2b25b0b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182448610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9426b94d9d183a2c866a6bfb3915ee9734f882a5d5a9ba3e46c41af5317f7f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182449802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfa3f5e7a14f42dd0208b25b4d3995f32f069f4eb1fa836ef5dd3f3270ca74d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182450501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8391f7e3804d717c43e6425ad1f9e550f43b3a54304d7acf85cfe2cbfd8789cf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182450502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a14b8988b34540a2df44a299b30736f2b7f11a04a20b2a9dc2eb0c5733941. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182450503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b743f85089b547024932b56e301962a9dae853a95c921fef78ae4cdb95a2cf. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA182552301.